Hello @Scott Graham
Thank you for reaching out to Microsoft QnA Platform. I assume you are using the same machine which you used for your previous employers to connect to OneDrive. There might be a possibility that this machine has cached Identity or credentials from your previous sign-ins. You can clear stale credentials for OneDrive and other Office Applications on which you used for your previous employer.
- Browse to "Control Panel\All Control Panel Items\Credential Manager >> Windows Credential" validate if you see OneDrive Credentials for your previous employer if yes clear those credentials.
- Clear cache associated to OneDrive App.
- You can also open OneDrive App and Reset OneDrive to fix any issues with the app.
If the issue persists, then would request you to create a support request with OneDrive Support. You can use following link to get more insights on support options available for Office 365: Contact Microsoft Office Support
I hope this helps.
----------
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.